Note 1 :

Symptoms of incorrect i.e, reverse connection of PS1 and PS3 to BC controller board

Symptom

Cooling-only

Cooling-principal

Heating-only

Heating-principal

 

Insufficient

SC11 large

Warm indoor

SC11 small

Insufficient heating

SC11 large

Normal

cooling.

SC16 small

SC small. When

SC16 small

Warm indoor SC small

SC16 small

 

PHM < 0

SV opens some

PHM < 0

When SV opens some

PHM < 0

 

 

 

 

 

noise produced.

 

noise produced.

 

 

 

 

 

 

 

 

Note 2 :

Check using LED monitor display switch (outdoor MAIN board SW1)

Measured Data

Signal

 

SW1 Setting

 

 

 

Remarks

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High pressure of

HPS

1

2

3

4

5

6

7

8

9

10

 

See converter.

ON

 

 

 

 

 

 

 

 

 

 

 

outdoor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low pressure satura-

TH2

 

1

2

3

4

5

6

7

8

9

10

 

See converter.

tion temperature

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low pressure of

LPS

1

2

3

4

5

6

7

8

9

10

 

See converter.

ON

 

 

 

 

 

 

 

 

 

 

 

outdoor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BC controller pressure

PS1

 

1

2

3

4

5

6

7

8

9

10

 

Convert saturation

ON

 

 

 

 

 

 

 

 

 

 

 

(liquid measurement)

 

 

 

 

 

 

 

 

 

 

 

 

temperature to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

desired pressure

(intermediate)

PS3

1

2 3

4 5

6

7

8

9

10

 

ON

 

 

 

 

 

 

 

 

 

 

 

using converter.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note 3 :

Check CNP1 (liquid measurement) and CMP3 (intermediate) connectors on BC controller board for disconnection or looseness.

Note 4 :

With the sensor of the applicable connector removed from the board, use the LED monitor display switch (Note 1) to check the pressure value.

Pressure Sensor Replacement Precaution

(Pressure sensor output voltage)

–91–

Page 93
Image 93
Mitsubishi Electronics PURY-P400, P500YMF-C specifications Hps

PURY-P400, P500YMF-C specifications

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